I question the PTSD diagnosis. If you've ever met or treated someone with a legit PTSD diagnosis; they wouldn't spend the afternoon hanging out at the gun range.
If Rough suffered from PTSD it's not combat related based on information surfacing. His superiors and teammates are disputing most of his PTSD related "memories".
Ex: as an armorer he apparently never left the ship in Haiti... So his traumatic "memories" apparently did not happen. Same for his Iraq stories.
By all accounts he was showing severe schizophrenia symptoms, and possibly had been for a while.
Likewise, indications are that recruiters should not have accepted his enlistment based on background info. Or at least would not not. Its not clear yet how that slipped through.
There could be some family liability before it's over with, as they knew he was very unstable and did not share that info.